NOBODY KNOWS WHAT HORRORS LURK IN THE BOWELS OF THE CITY. THE SEWER POLICE WORK HARD TO KEEP IT THAT WAY. For Lieutenant Wilson Jericho, Hell is real: and it's in the sewers of the sprawling city Megalopol, where, as an officer of the Sewer Police, he's responsible for ensuring the proper functioning keeping the bowels of the city running smoothly. He knows everything there is to know about the underworld, which is why he's chosen to serve as tour guide for Sandra Yeatman, a young scientist who aims to prove the truth of legends about the strange wildlife in the sewers. Soon, Jericho finds that there is still much for him to learn, as they discover an invasion of mutant spiders ready to tear the city apart.